1
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Sarri G, Schumaker W, Di Piazza A, Vargas M, Dromey B, Dieckmann ME, Chvykov V, Maksimchuk A, Yanovsky V, He ZH, Hou BX, Nees JA, Thomas AGR, Keitel CH, Zepf M, Krushelnick K. Sarri et al. Reply. Phys Rev Lett 2020; 124:179502. [PMID: 32412293 DOI: 10.1103/physrevlett.124.179502] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/25/2019] [Accepted: 04/08/2020] [Indexed: 06/11/2023]
Affiliation(s)
- G Sarri
- School of Mathematics and Physics, The Queen's University of Belfast, BT7 1NN Belfast, United Kingdom
| | - W Schumaker
- Center for Ultrafast Optical Science, University of Michigan, Ann Arbor, Michigan 48109-2099, USA
| | - A Di Piazza
- Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg, Germany
| | - M Vargas
- Center for Ultrafast Optical Science, University of Michigan, Ann Arbor, Michigan 48109-2099, USA
| | - B Dromey
- School of Mathematics and Physics, The Queen's University of Belfast, BT7 1NN Belfast, United Kingdom
| | - M E Dieckmann
- School of Mathematics and Physics, The Queen's University of Belfast, BT7 1NN Belfast, United Kingdom
| | - V Chvykov
- Center for Ultrafast Optical Science, University of Michigan, Ann Arbor, Michigan 48109-2099, USA
| | - A Maksimchuk
- Center for Ultrafast Optical Science, University of Michigan, Ann Arbor, Michigan 48109-2099, USA
| | - V Yanovsky
- Center for Ultrafast Optical Science, University of Michigan, Ann Arbor, Michigan 48109-2099, USA
| | - Z H He
- Center for Ultrafast Optical Science, University of Michigan, Ann Arbor, Michigan 48109-2099, USA
| | - B X Hou
- Center for Ultrafast Optical Science, University of Michigan, Ann Arbor, Michigan 48109-2099, USA
| | - J A Nees
- Center for Ultrafast Optical Science, University of Michigan, Ann Arbor, Michigan 48109-2099, USA
| | - A G R Thomas
- Center for Ultrafast Optical Science, University of Michigan, Ann Arbor, Michigan 48109-2099, USA
| | - C H Keitel
- Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg, Germany
| | - M Zepf
- School of Mathematics and Physics, The Queen's University of Belfast, BT7 1NN Belfast, United Kingdom
- Helmholtz Institute Jena, Fröbelstieg 3, 07743 Jena, Germany
| | - K Krushelnick
- Center for Ultrafast Optical Science, University of Michigan, Ann Arbor, Michigan 48109-2099, USA
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2
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Warwick J, Dzelzainis T, Dieckmann ME, Schumaker W, Doria D, Romagnani L, Poder K, Cole JM, Alejo A, Yeung M, Krushelnick K, Mangles SPD, Najmudin Z, Reville B, Samarin GM, Symes DD, Thomas AGR, Borghesi M, Sarri G. Experimental Observation of a Current-Driven Instability in a Neutral Electron-Positron Beam. Phys Rev Lett 2017; 119:185002. [PMID: 29219555 DOI: 10.1103/physrevlett.119.185002] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/10/2017] [Indexed: 06/07/2023]
Abstract
We report on the first experimental observation of a current-driven instability developing in a quasineutral matter-antimatter beam. Strong magnetic fields (≥1 T) are measured, via means of a proton radiography technique, after the propagation of a neutral electron-positron beam through a background electron-ion plasma. The experimentally determined equipartition parameter of ε_{B}≈10^{-3} is typical of values inferred from models of astrophysical gamma-ray bursts, in which the relativistic flows are also expected to be pair dominated. The data, supported by particle-in-cell simulations and simple analytical estimates, indicate that these magnetic fields persist in the background plasma for thousands of inverse plasma frequencies. The existence of such long-lived magnetic fields can be related to analog astrophysical systems, such as those prevalent in lepton-dominated jets.
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Affiliation(s)
- J Warwick
- School of Mathematics and Physics, Queen's University Belfast, University Road, Belfast BT7 1NN, United Kingdom
| | - T Dzelzainis
- School of Mathematics and Physics, Queen's University Belfast, University Road, Belfast BT7 1NN, United Kingdom
| | - M E Dieckmann
- Department of Science and Technology (ITN), Linköping University, Campus Norrköping, 60174 Norrköping, Sweden
| | - W Schumaker
- SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA
| | - D Doria
- School of Mathematics and Physics, Queen's University Belfast, University Road, Belfast BT7 1NN, United Kingdom
| | - L Romagnani
- LULI, Ecole Polytechnique, CNRS, CEA, UPMC, 91128 Palaiseau, France
| | - K Poder
- The John Adams Institute for Accelerator Science, Blackett Laboratory, Imperial College London, London SW72AZ, United Kingdom
| | - J M Cole
- The John Adams Institute for Accelerator Science, Blackett Laboratory, Imperial College London, London SW72AZ, United Kingdom
| | - A Alejo
- School of Mathematics and Physics, Queen's University Belfast, University Road, Belfast BT7 1NN, United Kingdom
| | - M Yeung
- School of Mathematics and Physics, Queen's University Belfast, University Road, Belfast BT7 1NN, United Kingdom
| | - K Krushelnick
- Center for Ultrafast Optical Science, University of Michigan, Ann Arbor, Michigan 481099-2099, USA
| | - S P D Mangles
- The John Adams Institute for Accelerator Science, Blackett Laboratory, Imperial College London, London SW72AZ, United Kingdom
| | - Z Najmudin
- The John Adams Institute for Accelerator Science, Blackett Laboratory, Imperial College London, London SW72AZ, United Kingdom
| | - B Reville
- School of Mathematics and Physics, Queen's University Belfast, University Road, Belfast BT7 1NN, United Kingdom
| | - G M Samarin
- School of Mathematics and Physics, Queen's University Belfast, University Road, Belfast BT7 1NN, United Kingdom
| | - D D Symes
- Central Laser Facility, Rutherford Appleton Laboratory, Didcot, Oxfordshire OX11 0QX, United Kingdom
| | - A G R Thomas
- Center for Ultrafast Optical Science, University of Michigan, Ann Arbor, Michigan 481099-2099, USA
- Physics Department, Lancaster University, Lancaster LA1 4YB, United Kingdom
| | - M Borghesi
- School of Mathematics and Physics, Queen's University Belfast, University Road, Belfast BT7 1NN, United Kingdom
| | - G Sarri
- School of Mathematics and Physics, Queen's University Belfast, University Road, Belfast BT7 1NN, United Kingdom
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3
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Göde S, Rödel C, Zeil K, Mishra R, Gauthier M, Brack FE, Kluge T, MacDonald MJ, Metzkes J, Obst L, Rehwald M, Ruyer C, Schlenvoigt HP, Schumaker W, Sommer P, Cowan TE, Schramm U, Glenzer S, Fiuza F. Relativistic Electron Streaming Instabilities Modulate Proton Beams Accelerated in Laser-Plasma Interactions. Phys Rev Lett 2017; 118:194801. [PMID: 28548516 DOI: 10.1103/physrevlett.118.194801] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/18/2016] [Indexed: 06/07/2023]
Abstract
We report experimental evidence that multi-MeV protons accelerated in relativistic laser-plasma interactions are modulated by strong filamentary electromagnetic fields. Modulations are observed when a preplasma is developed on the rear side of a μm-scale solid-density hydrogen target. Under such conditions, electromagnetic fields are amplified by the relativistic electron Weibel instability and are maximized at the critical density region of the target. The analysis of the spatial profile of the protons indicates the generation of B>10 MG and E>0.1 MV/μm fields with a μm-scale wavelength. These results are in good agreement with three-dimensional particle-in-cell simulations and analytical estimates, which further confirm that this process is dominant for different target materials provided that a preplasma is formed on the rear side with scale length ≳0.13λ_{0}sqrt[a_{0}]. These findings impose important constraints on the preplasma levels required for high-quality proton acceleration for multipurpose applications.
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Affiliation(s)
- S Göde
- High Energy Density Science Division, SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA
- European XFEL GmbH, Holzkoppel 4, 22869 Schenefeld, Germany
| | - C Rödel
- High Energy Density Science Division, SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA
- Friedrich-Schiller-University Jena, Max-Wien-Platz 1, 07743 Jena, Germany
| | - K Zeil
- Helmholtz-Zentrum Dresden-Rossendorf, Institute of Radiation Physics, Bautzner Landstr. 400, 01328 Dresden, Germany
| | - R Mishra
- High Energy Density Science Division, SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA
| | - M Gauthier
- High Energy Density Science Division, SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA
| | - F-E Brack
- Helmholtz-Zentrum Dresden-Rossendorf, Institute of Radiation Physics, Bautzner Landstr. 400, 01328 Dresden, Germany
- Technische Universität Dresden, 01062 Dresden, Germany
| | - T Kluge
- Helmholtz-Zentrum Dresden-Rossendorf, Institute of Radiation Physics, Bautzner Landstr. 400, 01328 Dresden, Germany
| | - M J MacDonald
- High Energy Density Science Division, SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA
- University of Michigan, Ann Arbor, Michigan 48109, USA
| | - J Metzkes
- Helmholtz-Zentrum Dresden-Rossendorf, Institute of Radiation Physics, Bautzner Landstr. 400, 01328 Dresden, Germany
| | - L Obst
- Helmholtz-Zentrum Dresden-Rossendorf, Institute of Radiation Physics, Bautzner Landstr. 400, 01328 Dresden, Germany
- Technische Universität Dresden, 01062 Dresden, Germany
| | - M Rehwald
- Helmholtz-Zentrum Dresden-Rossendorf, Institute of Radiation Physics, Bautzner Landstr. 400, 01328 Dresden, Germany
- Technische Universität Dresden, 01062 Dresden, Germany
| | - C Ruyer
- High Energy Density Science Division, SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA
- CEA, DAM, DIF, F-91297 Arpajon, France
| | - H-P Schlenvoigt
- Helmholtz-Zentrum Dresden-Rossendorf, Institute of Radiation Physics, Bautzner Landstr. 400, 01328 Dresden, Germany
| | - W Schumaker
- High Energy Density Science Division, SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA
| | - P Sommer
- Helmholtz-Zentrum Dresden-Rossendorf, Institute of Radiation Physics, Bautzner Landstr. 400, 01328 Dresden, Germany
- Technische Universität Dresden, 01062 Dresden, Germany
| | - T E Cowan
- Helmholtz-Zentrum Dresden-Rossendorf, Institute of Radiation Physics, Bautzner Landstr. 400, 01328 Dresden, Germany
- Technische Universität Dresden, 01062 Dresden, Germany
| | - U Schramm
- Helmholtz-Zentrum Dresden-Rossendorf, Institute of Radiation Physics, Bautzner Landstr. 400, 01328 Dresden, Germany
- Technische Universität Dresden, 01062 Dresden, Germany
| | - S Glenzer
- High Energy Density Science Division, SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA
| | - F Fiuza
- High Energy Density Science Division, SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA
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4
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Albert F, Lemos N, Shaw JL, Pollock BB, Goyon C, Schumaker W, Saunders AM, Marsh KA, Pak A, Ralph JE, Martins JL, Amorim LD, Falcone RW, Glenzer SH, Moody JD, Joshi C. Observation of Betatron X-Ray Radiation in a Self-Modulated Laser Wakefield Accelerator Driven with Picosecond Laser Pulses. Phys Rev Lett 2017; 118:134801. [PMID: 28409970 DOI: 10.1103/physrevlett.118.134801] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/31/2016] [Indexed: 06/07/2023]
Abstract
We investigate a new regime for betatron x-ray emission that utilizes kilojoule-class picosecond lasers to drive wakes in plasmas. When such laser pulses with intensities of ∼5×10^{18} W/cm^{2} are focused into plasmas with electron densities of ∼1×10^{19} cm^{-3}, they undergo self-modulation and channeling, which accelerates electrons up to 200 MeV energies and causes those electrons to emit x rays. The measured x-ray spectra are fit with a synchrotron spectrum with a critical energy of 10-20 keV, and 2D particle-in-cell simulations were used to model the acceleration and radiation of the electrons in our experimental conditions.
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Affiliation(s)
- F Albert
- Lawrence Livermore National Laboratory, NIF and Photon Sciences, 7000 East Avenue, Livermore, California 94550, USA
| | - N Lemos
- Lawrence Livermore National Laboratory, NIF and Photon Sciences, 7000 East Avenue, Livermore, California 94550, USA
- Department of Electrical Engineering, University of California, Los Angeles, California 90095, USA
| | - J L Shaw
- Department of Electrical Engineering, University of California, Los Angeles, California 90095, USA
| | - B B Pollock
- Lawrence Livermore National Laboratory, NIF and Photon Sciences, 7000 East Avenue, Livermore, California 94550, USA
| | - C Goyon
- Lawrence Livermore National Laboratory, NIF and Photon Sciences, 7000 East Avenue, Livermore, California 94550, USA
| | - W Schumaker
- SLAC National Accelerator Laboratory, Stanford, California 94309, USA
| | - A M Saunders
- Lawrence Berkeley National Laboratory and University of California Berkeley, Berkeley, California 94720, USA
| | - K A Marsh
- Department of Electrical Engineering, University of California, Los Angeles, California 90095, USA
| | - A Pak
- Lawrence Livermore National Laboratory, NIF and Photon Sciences, 7000 East Avenue, Livermore, California 94550, USA
| | - J E Ralph
- Lawrence Livermore National Laboratory, NIF and Photon Sciences, 7000 East Avenue, Livermore, California 94550, USA
| | - J L Martins
- GoLP/Instituto de Plasmas e Fusão Nuclear, Instituto Superior Técnico, Universidade de Lisboa, 1049-001 Lisbon, Portugal
| | - L D Amorim
- Department of Electrical Engineering, University of California, Los Angeles, California 90095, USA
- GoLP/Instituto de Plasmas e Fusão Nuclear, Instituto Superior Técnico, Universidade de Lisboa, 1049-001 Lisbon, Portugal
| | - R W Falcone
- Lawrence Berkeley National Laboratory and University of California Berkeley, Berkeley, California 94720, USA
| | - S H Glenzer
- SLAC National Accelerator Laboratory, Stanford, California 94309, USA
| | - J D Moody
- Lawrence Livermore National Laboratory, NIF and Photon Sciences, 7000 East Avenue, Livermore, California 94550, USA
| | - C Joshi
- Department of Electrical Engineering, University of California, Los Angeles, California 90095, USA
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5
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Fletcher LB, Zastrau U, Galtier E, Gamboa EJ, Goede S, Schumaker W, Ravasio A, Gauthier M, MacDonald MJ, Chen Z, Granados E, Lee HJ, Fry A, Kim JB, Roedel C, Mishra R, Pelka A, Kraus D, Barbrel B, Döppner T, Glenzer SH. High resolution x-ray Thomson scattering measurements from cryogenic hydrogen jets using the linac coherent light source. Rev Sci Instrum 2016; 87:11E524. [PMID: 27910564 DOI: 10.1063/1.4959792] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
We present the first spectrally resolved measurements of x-rays scattered from cryogenic hydrogen jets in the single photon counting limit. The 120 Hz capabilities of the LCLS, together with a novel hydrogen jet design [J. B. Kim et al., Rev. Sci. Instrum. (these proceedings)], allow for the ability to record a near background free spectrum. Such high-dynamic-range x-ray scattering measurements enable a platform to study ultra-fast, laser-driven, heating dynamics of hydrogen plasmas. This measurement has been achieved using two highly annealed pyrolytic graphite crystal spectrometers to spectrally resolve 5.5 keV x-rays elastically and inelastically scattered from cryogenic hydrogen and focused on Cornell-SLAC pixel array detectors [S. Herrmann et al., Nucl. Instrum. Methods Phys. Res., Sect. A 718, 550 (2013)].
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Affiliation(s)
- L B Fletcher
- SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA
| | | | - E Galtier
- SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA
| | - E J Gamboa
- SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA
| | - S Goede
- SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA
| | - W Schumaker
- SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA
| | - A Ravasio
- SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA
| | - M Gauthier
- SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA
| | - M J MacDonald
- SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA
| | - Z Chen
- SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA
| | - E Granados
- SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA
| | - H J Lee
- SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA
| | - A Fry
- SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA
| | - J B Kim
- SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA
| | - C Roedel
- SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA
| | - R Mishra
- SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA
| | - A Pelka
- Helmholtz Zentrum Dresden-Rossendorf, Dresden, Germany
| | - D Kraus
- Helmholtz Zentrum Dresden-Rossendorf, Dresden, Germany
| | - B Barbrel
- Department of Physics, University of California Berkeley, Berkeley, California 94720, USA
| | - T Döppner
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - S H Glenzer
- SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA
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6
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Sarri G, Corvan DJ, Schumaker W, Cole JM, Di Piazza A, Ahmed H, Harvey C, Keitel CH, Krushelnick K, Mangles SPD, Najmudin Z, Symes D, Thomas AGR, Yeung M, Zhao Z, Zepf M. Ultrahigh Brilliance Multi-MeV γ-Ray Beams from Nonlinear Relativistic Thomson Scattering. Phys Rev Lett 2014; 113:224801. [PMID: 25494074 DOI: 10.1103/physrevlett.113.224801] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/28/2014] [Indexed: 06/04/2023]
Abstract
We report on the generation of a narrow divergence (θ_{γ}<2.5 mrad), multi-MeV (E_{max}≈18 MeV) and ultrahigh peak brilliance (>1.8×10^{20} photons s^{-1} mm^{-2} mrad^{-2} 0.1% BW) γ-ray beam from the scattering of an ultrarelativistic laser-wakefield accelerated electron beam in the field of a relativistically intense laser (dimensionless amplitude a_{0}≈2). The spectrum of the generated γ-ray beam is measured, with MeV resolution, seamlessly from 6 to 18 MeV, giving clear evidence of the onset of nonlinear relativistic Thomson scattering. To the best of our knowledge, this photon source has the highest peak brilliance in the multi-MeV regime ever reported in the literature.
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Affiliation(s)
- G Sarri
- School of Mathematics and Physics, The Queen's University of Belfast, BT7 1NN Belfast, United Kingdom
| | - D J Corvan
- School of Mathematics and Physics, The Queen's University of Belfast, BT7 1NN Belfast, United Kingdom
| | - W Schumaker
- Center for Ultrafast Optical Science, University of Michigan, Ann Arbor, Michigan 48109-2099, USA
| | - J M Cole
- The John Adams Institute for Accelerator Science, Imperial College of Science, Technology and Medicine, London SW7 2AZ, United Kingdom
| | - A Di Piazza
- Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg, Germany
| | - H Ahmed
- School of Mathematics and Physics, The Queen's University of Belfast, BT7 1NN Belfast, United Kingdom
| | - C Harvey
- School of Mathematics and Physics, The Queen's University of Belfast, BT7 1NN Belfast, United Kingdom
| | - C H Keitel
- Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg, Germany
| | - K Krushelnick
- Center for Ultrafast Optical Science, University of Michigan, Ann Arbor, Michigan 48109-2099, USA
| | - S P D Mangles
- The John Adams Institute for Accelerator Science, Imperial College of Science, Technology and Medicine, London SW7 2AZ, United Kingdom
| | - Z Najmudin
- The John Adams Institute for Accelerator Science, Imperial College of Science, Technology and Medicine, London SW7 2AZ, United Kingdom
| | - D Symes
- Central Laser Facility, Rutherford Appleton Laboratory, Didcot, Oxfordshire OX11 0QX, United Kingdom
| | - A G R Thomas
- Center for Ultrafast Optical Science, University of Michigan, Ann Arbor, Michigan 48109-2099, USA
| | - M Yeung
- Helmholtz Institute Jena, Fröbelstieg 3, 07743 Jena, Germany
| | - Z Zhao
- Center for Ultrafast Optical Science, University of Michigan, Ann Arbor, Michigan 48109-2099, USA
| | - M Zepf
- School of Mathematics and Physics, The Queen's University of Belfast, BT7 1NN Belfast, United Kingdom and Helmholtz Institute Jena, Fröbelstieg 3, 07743 Jena, Germany
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7
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Sarri G, Schumaker W, Di Piazza A, Vargas M, Dromey B, Dieckmann ME, Chvykov V, Maksimchuk A, Yanovsky V, He ZH, Hou BX, Nees JA, Thomas AGR, Keitel CH, Zepf M, Krushelnick K. Table-top laser-based source of femtosecond, collimated, ultrarelativistic positron beams. Phys Rev Lett 2013; 110:255002. [PMID: 23829742 DOI: 10.1103/physrevlett.110.255002] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/20/2012] [Indexed: 06/02/2023]
Abstract
The generation of ultrarelativistic positron beams with short duration (τ(e+) ≃ 30 fs), small divergence (θ(e+) ≃ 3 mrad), and high density (n(e+) ≃ 10(14)-10(15) cm(-3)) from a fully optical setup is reported. The detected positron beam propagates with a high-density electron beam and γ rays of similar spectral shape and peak energy, thus closely resembling the structure of an astrophysical leptonic jet. It is envisaged that this experimental evidence, besides the intrinsic relevance to laser-driven particle acceleration, may open the pathway for the small-scale study of astrophysical leptonic jets in the laboratory.
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Affiliation(s)
- G Sarri
- School of Mathematics and Physics, The Queen's University of Belfast, BT7 1NN Belfast, United Kingdom
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8
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Schumaker W, Nakanii N, McGuffey C, Zulick C, Chyvkov V, Dollar F, Habara H, Kalintchenko G, Maksimchuk A, Tanaka KA, Thomas AGR, Yanovsky V, Krushelnick K. Ultrafast electron radiography of magnetic fields in high-intensity laser-solid interactions. Phys Rev Lett 2013; 110:015003. [PMID: 23383801 DOI: 10.1103/physrevlett.110.015003] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/09/2012] [Indexed: 06/01/2023]
Abstract
Using electron bunches generated by laser wakefield acceleration as a probe, the temporal evolution of magnetic fields generated by a 4 × 10(19) W/cm(2) ultrashort (30 fs) laser pulse focused on solid density targets is studied experimentally. Magnetic field strengths of order B(0) ~ 10(4) T are observed expanding at close to the speed of light from the interaction point of a high-contrast laser pulse with a 10-μm-thick aluminum foil to a maximum diameter of ~1 mm. The field dynamics are shown to agree with particle-in-cell simulations.
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Affiliation(s)
- W Schumaker
- Center for Ultrafast Optical Science, University of Michigan, Ann Arbor, Michigan 48109, USA
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9
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Jolly SW, He Z, McGuffey C, Schumaker W, Krushelnick K, Thomas AGR. Stereolithography based method of creating custom gas density profile targets for high intensity laser-plasma experiments. Rev Sci Instrum 2012; 83:073503. [PMID: 22852691 DOI: 10.1063/1.4731782] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
Laser based stereolithography methods are shown to be useful for production of gas targets for high intensity laser-plasma interaction experiments. A cylindrically symmetric nozzle with an opening of approximately 100 μm and a periodic attachment of variable periodicity are outlined in detail with associated density profile characterization. Both components are durable within the limits of relevant experiments.
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Affiliation(s)
- S W Jolly
- Center for Ultrafast Optical Sciences, University of Michigan, Ann Arbor, Michigan 48105, USA
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10
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McGuffey C, Thomas AGR, Schumaker W, Matsuoka T, Chvykov V, Dollar FJ, Kalintchenko G, Yanovsky V, Maksimchuk A, Krushelnick K, Bychenkov VY, Glazyrin IV, Karpeev AV. Ionization induced trapping in a laser wakefield accelerator. Phys Rev Lett 2010; 104:025004. [PMID: 20366605 DOI: 10.1103/physrevlett.104.025004] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/03/2009] [Indexed: 05/29/2023]
Abstract
Experimental studies of electrons produced in a laser wakefield accelerator indicate trapping initiated by ionization of target gas atoms. Targets composed of helium and controlled amounts of various gases were found to increase the beam charge by as much as an order of magnitude compared to pure helium at the same electron density and decrease the beam divergence from 5.1+/-1.0 to 2.9+/-0.8 mrad. The measurements are supported by particle-in-cell modeling including ionization. This mechanism should allow generation of electron beams with lower emittance and higher charge than in preionized gas.
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Affiliation(s)
- C McGuffey
- Center for Ultrafast Optical Science, The University of Michigan, Ann Arbor, Michigan 48109, USA
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